What do I need to do to prepare myself before a 3 wisdom teeth extraction?

Hello! Today I went to my dentist and he told me next Tuesday I will get my 3 wisdom teeth extracted . He didn't say anything to prepare myself for surgery :( . What do I need to do for the big day to come.my surgery is in the morning , do I need to eat before that or no eat after midnight , or do I need to take something .Im very nervous person . How long this surgery take ? Plz help !! Thanks !!